Security advisory

{
  "id": "5efd8455823d1fe16c8a995ff48c4adea4f4c90b75d99b6b19ce310b22a1e98a",
  "url": "https://osv.dev/vulnerability/CVE-2018-0500",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-0500",
    "summary": "Curl_smtp_escape_eob in lib/smtp.c in curl 7.54.1 to and including curl 7.60.0 has a heap-based buffer overflow that might be exploitable by an attacker who can control the data that curl transmits over SMTP with certain settings (i.e., use of a nonstandard --limit-rate argument or CURLOPT_BUFFERSIZE value).",
    "evidence": "osv:CVE-2018-0500",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2018-0500",
      "aliases": [
        "CURL-CVE-2018-0500",
        "CVE-2018-0500"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/curl/curl",
              "type": "GIT",
              "events": [
                {
                  "introduced": "54b636f14546d3fde9f9c67c3b32701d78563161"
                },
                {
                  "last_affected": "cb013830383f1ccc9757aba36bc32df5ec281c02"
                },
                {
                  "fixed": "ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.54.1"
                      },
                      {
                        "last_affected": "7.60.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "curl-7_60_0",
            "curl-7_59_0",
            "curl-7_58_0",
            "curl-7_57_0",
            "curl-7_56_1",
            "curl-7_56_0",
            "curl-7_55_1",
            "curl-7_55_0",
            "curl-7_54_1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-0500.json",
            "vanir_signatures": [
              {
                "id": "CVE-2018-0500-1da300f5",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "100346489179498015074596516711790345714",
                    "36398893905587497857396509459642227416",
                    "83528369294652915166766063052770479545",
                    "119381144070371804446013776337879380459",
                    "308943778265509870019894021240107613861",
                    "167054270400523215026863660412897532998",
                    "326483793231161323803805689795008028311",
                    "214925078150770847850926944304516077504",
                    "226951013112595546245203535799648872728"
                  ]
                },
                "source": "https://github.com/curl/curl/commit/ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628",
                "target": {
                  "file": "lib/smtp.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2018-0500-9a00892e",
                "digest": {
                  "length": 1560,
                  "function_hash": "220425643078242232243892256799210626195"
                },
                "source": "https://github.com/curl/curl/commit/ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628",
                "target": {
                  "file": "lib/smtp.c",
                  "function": "Curl_smtp_escape_eob"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:30:37Z"
          }
        }
      ],
      "modified": "2026-10-20T13:30:37.393096880Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/errata/RHSA-2018:2486",
        "https://security.gentoo.org/glsa/201807-04",
        "https://usn.ubuntu.com/3710-1/",
        "https://curl.haxx.se/docs/adv_2018-70a2.html",
        "https://github.com/curl/curl/commit/ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "17.10"
                  },
                  {
                    "last_affected": "17.10"
                  },
                  {
                    "introduced": "18.04"
                  },
                  {
                    "last_affected": "18.04"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-0500",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387761,
  "published_at": "2018-07-11T13:29:00.317+00:00"
}